已知△
的内角
、
、
满足
.
(1)求角
;
(2)若
,
,求△
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc58831965442dc48a5642b48187a89.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09eebab59213386449a726b75065bf76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
2020高三·全国·专题练习 查看更多[3]
(已下线)专题23 解三角形综合练习-2021年高考一轮数学(文)单元复习一遍过(已下线)专题23 解三角形综合练习-2021年高考一轮数学(理)单元复习一遍过(已下线)专题23 解三角形综合练习-2021年高考一轮数学单元复习一遍过(新高考地区专用)
更新时间:2020-09-10 21:43:27
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知
的内角
、
、
的对边分别为
、
、
,若
.
(1)求角
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7efd9dafbeef5eb7988b57e1015ff9.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b104867a12d24a353d94858c2fa17c8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa6361e919ac07ee6ed642556e1d1ae.png)
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【推荐2】已知
,且
,
.
(1)求
;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f8b19cac0777b84bbc9328f11fb57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be5d2ab18523d7c39e6f164daad439e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd0ec23e454440796739087fde0a373.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bd7c69ca8da57624f618de3918eeeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2894710ad17e08f1b98760e66bf02c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a240f56cefeb8c9669b54b02ca445c4e.png)
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【推荐1】在
中,角
的对边分别为
,已知
.
(Ⅰ)求角
的大小;
(Ⅱ)若
,求
周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ca4d7d1d053fd046a280ace4447232.png)
(Ⅰ)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】某地在路边安装路灯,灯柱
与地面垂直,满足
,灯杆
与灯柱
所在平面与道路垂直,且
,路灯
采用锥形灯罩,射出的光线如图中阴影部分所示,已知
,路宽
,单位为
.
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/b1f9c976-c53d-4f76-928f-5298aa5a1fb3.png?resizew=187)
(1)当
时,求四边形
的面积;
(2)若灯杆
与灯柱
所用材料相同,记此用料长度和为
,求
关于
的函数表达式,并求出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aedf65d7d930fdb972d4802c0dea8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59567dbf014b5608475254efb2cf2c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbab64c34b6317ee4c68ba7f8d56c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ee2c2082e35f409e2a5280a7ed34c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd16de2bd1c5c7944eb86070ada38ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/b1f9c976-c53d-4f76-928f-5298aa5a1fb3.png?resizew=187)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74dc2063147bb66cc18c7cab905bb662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若灯杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐1】在△ABC中,角A,B,C的对边分别为a,b,c,且
.
(1)求角B;
(2)若a+c=7,△ABC的面积为
,求△ABC的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65aa2d1531fea86b574ddf84be1fcf6c.png)
(1)求角B;
(2)若a+c=7,△ABC的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b283dff34b1dcf9582484f0c7adc87f4.png)
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【推荐2】在
中,
分别为角
所对的边,已知
.
(1)求角B的值;
(2)若
为锐角三角形,且
,求
的面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90d7f054e8f0346479e1999622f11cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516983449108347c9bbf5dd2a72ab3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d37b2f8d5da8eaa07442b941017c1c.png)
(1)求角B的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次